Sixty years back, an odd bout of sleeplessness swept across the populace, compelling them to remain awake for more than a single week. The sufferers, utterly deprived of rest, all descended into madness. To remedy this affliction, a novel drug was devised, yet its adverse effects transformed the patients into vampires. The human race waged war against this emergent kind and prevailed, though a handful of vampires escaped. Born from a Human and a Vampire, the protagonist Mi Liu—dubbed "The Child of Hope"—embodies the fresh promise that will bridge both species. As leader of a bank heist, Mi Liu is captured and sent to a specialized penitentiary run by the National Defense Agency that supervises vampires. While attempting escape with Anji, Mi Liu is assaulted by uncanny beasts and discovers that the facility sits on the very site where vampires originated, the ancient capital "Blue Town." Why are vampires confined to Blue Town? What are those bizarre creatures assaulting them? Our protagonists must battle to unravel these enigmas and find answers.